Proteomic analysis of purified coronavirus infectious bronchitis virus particles.

Proteomic analysis of purified coronavirus infectious bronchitis virus particles.
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DOI:
10.1186/1477-5956-8-29
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发表时间:
2010-06-09
期刊:
影响因子:
2
通讯作者:
Cao Y
Cao Y
中科院分区:
生物学4区
文献类型:
--
作者:
Kong Q;Xue C;Ren X;Zhang C;Li L;Shu D;Bi Y;Cao Y

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传染性支气管炎病毒(IBV)是家禽的冠状病毒,给养殖业造成重大经济损失。由于IBV生命周期的复杂性和病毒结构蛋白的数量很少,重要的病毒与宿主之间的关系可能仍有待发现。为了实现这一目标,我们进行了双向凝胶电泳分离和质谱学鉴定相结合的方法,对纯化的IBV颗粒进行了全面的蛋白质组学分析。除了病毒编码的结构蛋白外,我们还在纯化的病毒粒子中检测到60种宿主蛋白,这些蛋白可分为几类功能蛋白,包括细胞内运输蛋白(20%)、分子伴侣(18%)、大分子生物合成蛋白(17%)、细胞骨架蛋白(15%)、信号转运蛋白(15%)、蛋白质降解(8%)、染色体相关蛋白(2%)、核糖体蛋白(2%)和其他功能蛋白(3%)。有趣的是,总宿主蛋白中有21个未见报道存在于其他病毒科的病毒粒子中,如主要的vault蛋白、TENP蛋白、卵清蛋白和清道夫受体蛋白。用蛋白质组学方法鉴定宿主蛋白后,用免疫印迹和免疫胶体金标记法证实纯化的IBV制剂中含有4种蛋白。这些结果提供了第一个标准的IBV蛋白质组图谱,并可能有助于理解致病机制。
Infectious bronchitis virus (IBV) is the coronavirus of domestic chickens causing major economic losses to the poultry industry. Because of the complexity of the IBV life cycle and the small number of viral structural proteins, important virus-host relationships likely remain to be discovered. Toward this goal, we performed two-dimensional gel electrophoresis fractionation coupled to mass spectrometry identification approaches to perform a comprehensive proteomic analysis of purified IBV particles. Apart from the virus-encoded structural proteins, we detected 60 host proteins in the purified virions which can be grouped into several functional categories including intracellular trafficking proteins (20%), molecular chaperone (18%), macromolcular biosynthesis proteins (17%), cytoskeletal proteins (15%), signal transport proteins (15%), protein degradation (8%), chromosome associated proteins (2%), ribosomal proteins (2%), and other function proteins (3%). Interestingly, 21 of the total host proteins have not been reported to be present in virions of other virus families, such as major vault protein, TENP protein, ovalbumin, and scavenger receptor protein. Following identification of the host proteins by proteomic methods, the presence of 4 proteins in the purified IBV preparation was verified by western blotting and immunogold labeling detection. The results present the first standard proteomic profile of IBV and may facilitate the understanding of the pathogenic mechanisms.
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